Item description

Simulation of airflow inside a cylindrical dryer in Ansys Fluent

Dryers are another applied mechanisms used in the industry. The most common use of dryers is in the food and mineral industry. The mechanism of the dryers mainly acts by passing hot air through the materials leads to a reduction in the moisture content. In this type of dryer, the hot air is sent to the inside of the material which is placed inside a cylindrical container and is embedded in the outer wall of the enclosure. This hot air, passing through moisture-containing materials, evaporates the water inside them, and this vapor emits through the holes embedded in the body of the outer wall of the enclosure.

In this analysis, it has been tried to simulate and analyze the airflow inside a dryer using Ansys Fluent software.

Geometry and Mesh

The geometry required for this analysis is designed by the Gambit software. Meshing is also generated in Gambit software. The type of meshing made for this geometry is unstructured. The total number of cells created for this geometry is 1674558 cells.

Model

To analyze flow turbulency in this project, the K-epsilon RNG turbulence viscosity model has been used. The Standard Wall function model is also used near the wall. The ideal gas state equation is used to check the temperature variations based on temperature. The energy and momentum equations are also solved simultaneously.

Boundary Condition

The airflow input for this geometry is defined as Velocity-Inlet and its value is 10 m/s, and the temperature is 300 K for it. For the wall of the dryer, the Wall boundary condition is Coupled to the temperature boundary condition. The required boundary condition for the wall around the domain is also applied in the form of Pressure-Outlet and the pressure Gauge is 0.

Discretization of equations

To solve the equations in this analysis, SIMPLE algorithm has been used. The pressure-based solver is used to analyze the flow. The Second Order Upwind method is also used in order to discretize the momentum equations.The results are shown in terms of velocity, pressure, and temperature and contours.

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